Elevator.



J. J. SPROUL.

ELEVATOR.

APPLICATION FILED IAY I. 1916.

4 SHEETS--S HEET I.

w 5 zziz rm: mwms Psrsns c0 PNOTG-LITNO WASHING mu. 0 c.

J. J.- SPROUL.

ELEVATOR.

APPLICATION FILED MAY 1, I916.

Patented Mar. 13, 1917.

4 SHEETS-SHEET 2.

1.1. SPROUL.

ELEVATOR.

APPLICATION FILED MAY 11 I916.

Patented Mar. 13, 1917.

4 SHEETSSHEET 3.

Hll Mwms PETERS 40,. PNDHLLITHOY.WASNINUMN 1, c.

Patented Mar, 13, 1917.

4 SHEETS-SHEET 4- J. J. SPROUL.

ELEVATOR.

APPLICATION FILED MAY 1. BIG.

Ulf llTED STATES PATENT OFFICE.

JOHN J. SPROUL, O1 NEX I YORK, I A.STII\ GS-UP"I 1L1 TO AUGUST SUNDTEI,OF iJDElGI' l', NE YORK.

ELEVATOR.

Application filed May 1, 1916. Serial No. 94,578

To all whom it may concern ie it known that 1, JOHN J. Sriiouri, acitizen of the United States, and resident of New York, in the county OfNew York and State of New York, have invented a certain new and usefulFlevator, of which the following is a specification.

My invention relates to elevators of the type in which a motor operatedby non- COIl'lPl'GSSllJlG fluid is employed to drive the elevator car,and more particularly the invention involves a motor d'iven by oil orother non-comp. sible fluid under steam pressure. Preferably, areciprocating motor is comiected to and arranged to rotate a drum fordriving the elevator car by means of hoisting cable The steam whichapplies pressure to the non-compressible fluid may be derived directlyfrom a steam generating plant in the building, or from an outside sourceof steam supply.

An object of the invention is to provide an elevator mr-ticularlyadapted for high buildings and which will have a high elli ciency, andwhich will be simple, safe and practical for driving the elevator bysteam pressure appli d directly to non-compressible fluid wl 'ch drivesthe motor for lit ing the car. The arrangement dispenses with the powertransforming elements including origin s, electric generators, andelectric motors, or pumps, usually interposed between the steam gen" torand the motor for driving the elevator car, as in hydraulic clc vators,wherein a steam pump is ei'uployed for returning the Fluid to thepressure tank, or as in ele ""ic elevators, wherein a steam engine andan electric generator are employed for generating current for the mo cemnts transforms the loss 0:? elliciency.

The invention also secures the advantages of an overhead motor connecteddirectly to the hoisting drum and adapted to rotate the same, andprovides for the use of a motor which is compara ively small, compactand light in weight, and therefore well adapted f r overhead use.

During the travel of the elevator car from the bottom to the top of itsrun, or vice versa, the motor makes a certain number of revolutions, anda corresponding amount of the non-compressible fluid which actuates thepower at a great Specification of Letters Patent.

L which drives the elevator, each of which 7 Patented Mar. 13, 191 *7.

cause it lubricates the engine, packings can be dispensed with in theengine, and the ellicieucy is greater and the life of the en gine longerthan when water is used therein. I employ a column of water howeverbetween the steam and oil to avoid heating of the oil and also toprevent oil from being drawn back with the water condensed iron thesteam, to the steam boiler.

I am familiar with, and have had espericnce in installing and operatingelevator systems known as hydro-steam elevators, in which a piston or aplunge is operated in a *ylinder and driven by fluid controlled by steamin a pressure tank. The present invention is an improvement on suchsystems, because it can be used to great advantage .in very highbuildings, since a rotary element is employed to drive the elevator. Asth steam is cond ici'ed from the generating of the building, the presentsystem can be usec where it would not be possible to use the old styleor hydro-steam elevator.

In the present system, 1 prefer to have he cables on the drum tree andoperated 3y frictional contact with the drum. This is an advantage inthat the drum does not need to be so large as would be required if thecables were fastened to the drum. I prefor L0 use a multiple cylinderengine, al-

though some other rotary engine might be used. A multiple cylinderengine has a large fact 1 of safety, as each cylinder forms a safetydevice, and there is hardly a possibility of all the cylinders breakingat one time. Also the multiple cylinder engine is you well adapted tooperate as a pump while the elevator car is descending, so that itoperates as a safety device and controller during both the ascent anddescent of the car.

In practising the inventioin the elevator car may be driven by anoverhead motor of the type above mentioned, which is connected directlyto a hoisting sheave to drive the car by means of cables running fronthe car over the sheave and connected to counterweights. Steam underpressure may be supplied from a generator in the basement of thebuilding or other convenient location. the steam being conveyed to anoverhead tank to supply pressure to water therein. Said tankcommunicates with a second pressure tank containing oil or the like fordriving the motor. The steam pressure when admitted to the water tanktransmitted through the water to the oil pressure tank forcing the oiltherein through the rotary motor to drive the same. The oil whichcirculates through the motor is conducted therefrom to a reservoir whichmay be open to atmospheric pressure. The motor is driven by the oil in adirection to lift the car.

The car may be lowered by its own weight the motor being driven therebyin the reverse direction, and acting as a pump to circulate the oilthrough the motor in the reverse direction, whereby the oil is returnedto the pressure tank. A friction brake may be connected to the motorshaft and may be operated to a released position by steam pressure. Thesupply of steam pressure to the water pressure tank, the circulation ofthe oil through the motor and the supply of steam to the brake, may becontrolled by magnetically operated valves electrically controlled fromthe car.

Other features and advantages of the invention will appear hereinafter.

Referring to the accompanying drawings which illustrate an elevatorsystem embodying the principles of my invention, Figure l is a partsectional elevation showing the elevator as installed in a building. Fi2 is a, front sectional elevation of the motor. Fin".

is a sectional side elevation of the same. Fig. 4 1s a part sectionalelevation of the brake and operating means therefor. Fig. 5 is anelevation view of the water pressure tank the valve controlling tnesupply of steam pressure thereto, and the electromagnets for operatingthe valve the valve being shown in section. 6 is a diagrammatic view ofthe electric circuits and the various controlling magnets. Fig. '3 is asectional plan view of the set of valves controlling the circulation ofliquid through the motor. the view being taken at the section line 7 7,on Fig. 9. Fig. 8 is a part sectional elevation of the same the sectionbeing at the line 8-8 on Fig. 9. Fig. 9 is an elevation of the samelooking in a direction at right angles to that of. Fig. 8. 10 is asectional elevation at the line 10-10., of Fig. 7.

Referring particularly to Fig. l, the elievator car 2 is driver by amotor B, having a shaft ll on which is mounted a hoisting sheave 12,over which run hoisting cables 13, connected at one end to the car andat the other end to a counterweight l t. The car counterweight travelbetween vertical 5 and lb respectively. A fricma be mounted directly onthe drive shaft 11. The motor 3 may be driven by forcing anon-compressilile liquid 17 preferably oil, to circulate through themotor, pressure being i ireferably supplied by steam.

A furnace 18, in basement of ing or other convenient location,

the build generates steam which is conveyed from the boiler 19, 0

through a pressure pipe 20 leading upward through the vfloors 2i, E23 ofthe building 0 a pressure tank D v-rh'ch contains a nonompressibl-efluid, preferably water. lhe n1 plv of steam. underpressure to the tankD is controlled by a valve actuated. by electromagnets and re, as willappear more fully hereinafter.

fin oil pressure tank F communicates with the tank D through aconnecting pipe 25 i t .nks. The tank F is fil 9 the bottom of the a ledwith oil and water the water remaining in the lower part of the tank,owing to its specific gravity being greater than that of the oil. l vhenthe car A is at the lower end of its sha t, the level of the water inthe tank is areierably just above tiie connecting pipe to prevent oilfrom running into the water tank D and rising through the water. Whensteam pressure is admitted to the tank D the water therein is forcedthrough the pipe 25 into the tank F, the oil in the tank l being forcedthrough a pressure pipe 2?) leading through a valve chest G to the motorit through which the oil circulates, thereby driving the motor to littthe car. The oil is conveyed from the motor through an exhaust pipewhich also leads through'tlie valve chest G to a reservoir 28. To lowerthe car the supply of steam pressure is cut off, permitting the car todescend by gravity thereby rotating the motor B in the reverse directionwhich also reverses the circulation. of the oil tierein. In other words,as the car descends the oil 17 runs from the reservoir 28 through themotor, being pumped by the motor back into the oil tank F, the oil as itenters said tank. forcing the wafer back into the tank D.

During the descent of the car the valve lt is in position 0 ct off thesteam pressure supply and open the tank to an exhaust pipe 29 whichleads to condensing chanr ber 30. the latter contains a condensing co1l31, through i hich may circulate water from a main 32. The coil 31 mayserve as a heating coil from which water may be drawn through pipes 33and 34.- leading to the hot water taps 35 at the dillerent floors of thebuilding. These taps 35 as well as cold water taps connected directly tothe main 32, may be mounted at sinks 37.

The upper level of the water in the pressure tank D may be controlled byan overflow tank 38. A portion of the steam as it comes in contact withthe water in the tank D is condensed and as the water reaches the levelof a pipe 39 near the top of the tank it runs therethreugh into anoverflow tank 38. The water as it rises in the overflow tank, hits afloat 10 and raises a valve all, thereby opening the tank to a drainpipe 412 leading downward to a tank 13. The latter may be connectedthrough a pipe 41 with the condensing chamber 30 to carry off the waterthat condenses in the latter. From the reservoir 1-8 the water may bepumped back into the steam boiler by a pump 45 driven by a motor 16.Thus very little water is wasted.

The valve mechanism for controlling the supply of steam to the pressuretank D will now be described Referring particularly to Fig. 5, theelectromagnets 47 and 48 for actuating the valve, may be convenientlymounted on the tank D. The magnet 47 comprises a core 17 connectedthrough a link 1-9 to an arm 50 secured to a rock shaft 51. The core 18of the magnet 48 is in like manner connected to said rock shaft. An arm553 fixed to the rock shaft 51 is connected through a link 53 to a valvepiston 5-1 which is vertically slidable in the cylindrical valve casingThe pressure and exhaust pipes 20 and communicate with the va ve chamber56 respectively below and above the valve section 57. With the parts intheir normal position of rest as shown in Fig. 5, which position isassumed when the car at rest, communication of the tank D with both thepressure and exhaust is cut oil by the valve s ction 57 which blocks thepipe 58 lead' 5 pm t 1e valve chamber to the tank. If

it is desired to supply pressure to the tank D, the electromagnet isenergized, causing its core 17 to be drawn inward, thereby rocking theshar t 51 and swingin the arm upward A dotted line position, therebylifting the valve section 57 into position to open the port 58 and blockthe exhaust pipe 29. The pressure pipe 20 is thus placed inconn'nunication with the pipe 5-8, admitting steam under pressure to thetank D. In order to open the tank D to the exhaust pipe 29, the magnet18 is energized so that its rawn downward rocking the to the upper core18 is o. shaft 51 and carrying the arm 02 downward to the lower dottedline position, thus moving the valve section 57 down to block thepressure pipe 20 and. open the pipe 58 to the exhaust pipe 29. hen theoperated magnet is again deenergized, a centering spring 60 operating onan arm 61 depending from the rock shaft 51, returns the pa to theirnormal position of rest. The valve mechanism which directly controls thecirculation of the oil through the motor and thereby regulates the speedof the motor will now be described.

This mechanism is shown in detail in Figs. 7, S, and 10. For the purposeof illl'lstration the i ve chest F is shown as containir" four verti valdisposed valves 61, ($2, 63, and 6". The oil for drivingthe motor flowsfrom the pressure pipe 26 into a pres-- sure chamber (35, (Fi 10) andfrom thence through one or more oi the valve chambi-u's (36 intopressure chzuuber 7 from which leads a pressure i. to the il'lOtOl. Thereturn pipe 69 from the motor leads to a chamber 0 which may beconnected through one or more of the valve chambers (36 to a chamber 27"which opens into the return pipe 27. lit should be noted that the valves(31, 62, 63, and 6 1, which may be identical in construction, are inparallel relation, each controlling a passage between the pressurechambers 65 and 67, and each also controlling a passage between theexhaust chambers and 27.

The valves 61, 6'2, 63, and 61 are operated respectively byelectromagnets 71, 7 2, 73 and 7 When the magnets are deenergized thevalves more doii' nward by gravity to their normal closed position shownin Fig. 10. With the valves in this position, it will be seen thatcommunication between the pressure pipes 65 and 67 is cut oil, alsobetween the exhaust chambers 70 and 27. Circulation of the oil throughthe motor is thus prevented. If an electromagnet, Fig. 10, is energized,the connected valve 61 is drawn upward from the Fig. 10 position to tileFi 8 position, so that communication is established from the pressurechamber to the chamber 67, whereby a How of oil to the motor ispermitted. At the same time the exhaust chamber 70 is opened to thexhaust chamber 27, permitting the return ilow of the oil from the motor.The speed of the motor is governed by the number of open valves. Themagnets 71 to 7 -'l-, for operating the valves are controller. ashereiuaiter pointed out.

The rotary motor B may be of the construction disclosed in the patent toA. Sundh, 1,159,613, or 01 other approved construction. F or a detaileddescription of the motor, reference may be had to said patent. Briefly,the motor comprises a vertical casting mounted on a bed plate 7 6, saidcasting containing a plurality of symmetrically disposed cylindricalbores 77, each of which may be lined with a bushing 78. lVithin each ofsaid bores is located an oscillating disk 79. Each disk is provided witha cychambers 87, there being one chamber 86 and one chamber S? for eachdist: 0. Each disk is provided with a port or passage 88 which may bebrought into COilllllllXllCiltion with. av pressure chamber 87, and apassa e r port 89 which may be brought into communication with an eXiaichamber 80. When a piston at the outer limit of its movement (as heuppermost piston in Fig. 2,) both the ports 88 and 89 are closed.itssumii'iq th crank to he ro ting in a counter ClO-L' use dircct'on lg.it will. be seen that the pistons (n tie ght ham side are being drawninwarl and that the ports 89 n'ovide an open passage from the pressurechamber 86 to the piston nders, so i is admitted to tle ylinders todrive them inward. lt vvil also be seen that the exhaust ports 88 arclosed. During the outward movement or the pistons, the oressure portsare closed and the exhaust ports 88 are open. thus a continuouscirculation through the motor while the i nin g. As the motor is run inthe reverse rection "While the car is going down, t ie on:- culation ofthe oil through the motor is reversed. The terms and exiaust have beenapplied tor convenience to var ous chan'ibers and pipes, but will beurderstood that these are merely elative terms and also that their useassumes that the motor is being driven in a certain direction.

The brake mechanism C comprises a pair of brz ke shoes 00 adapted tobear on a brake pulley 91 keyed to the shaft 11. The brake shoes arepivotally mounted on brake levers 92 connector by pivots 93 to astandard 9%. Toggle links 95 connect the brake levers to a piston rod 96and piston 07 which Works in a cylinder 98. The brake shoes are normally:a imlied by the power of a spring 99 which bears di'nvuwardly on thepiston 07. The brake shoes are lifted by steam pressure admitted to thecylinder 98 beneath the piston, through a port 100 controlled by a valve101, said valve being actuated by an electromagnet 102. When the magnet102 is energized and the valve 101 thereby littec, steam pressure isadmitted through a pipe 103, Fig. 1, through the port 100 and lifts thepiston 97 to release the brake shoes.

The various electromagnets are actuated from a controller in the carcomprising a controlling lever 10 i. Current is supplied from anvsuitable source, through positive and neg ive mains 106 and 10'?connected to the controlling circuits through a switch 105. It thecontrolling lever is moved to the right from a central position, itestablishes circuits through the magnets for 'ausing the motor to drivethe 'z r upward. The lever first makes connection with a contact bar 108and thereby e tablishes circuit for the electromagnet which may be thepositive main 100 throuo'l 109, switch lever 10 i, contact i ll conductmconductor magnet 1-7, conductor 11.1, b rake controlling magnet 102, andconductor 112 to the ne tive main. Tie magnet t? being energized liftsthe valve 7 i as already descr'bed to permit steam pressure to the tankD. The brake controlling magnet 102 at the same time permits steampressure to the cylinder 98 to release the brake.

The motor 13 is still locked against rot tion on account oi? the bank ofvalves G being closed and preventing the circulation of the oil throughthe motor, but the continued movement oi? the controller lever to theright immediately brings a Contact 118 on said lever into engagementWith a contact a, and then contacts 5, and o and (Z in successionthereby establishing circuits for the magnets '71, i3 and 7% respectivelWhen 11 5 conta with a, a circuit is completed through 001 ductor 109,contacts 11,

llet and agnet 71. The magnet 71 there- ;ore hits the valve (51 andpermits a retricted lieu: of oil through the motor under the steampressure transmitted through the Water and oil tanks D and F. The motoris thus started in a direction to lift the car but can only be run atslow speed owing to the restricti-:m of the oil through the pors oi thevalve 61.

38 the magnets 72, 73, and 7 1 are successively energised when thecontact 1.13 oncontacts o 0 (Z the valves 62 63 and r a. a a 7 7 7 1 lare successlvely opened permitting a correspondingly greater How of oilto the motor, thereby increasing its speed. llhen the controller leveris retur ed to central position the electron agnets controlled therebyare deenergised in the reverse order, permitting the valves to return tonormal position. The supply of oil to the motor is thus gradi'ially cutoil and then the supply of steam pressure to the tank l) and to thebrake cylinder 97, is also cut oil causing the b 'ake to be applied byits spring 90.

When the controller lever is thrown to the loft tr in central position,it first engages a contact 115 thereby establishing a circuit throughconductor 109, lever 10%, contact 115, conductor 110, electromagnet -18,brake controlling magnet 102, and conductor 112.

The magnet 48 moves the piston of the valve E downward, thereby openingthe tank D to the exhaust pipe 29. The continued movement of thecontroller lever to the left completes circuits for the magnets 71, 72,73 ant 74 through contacts a, 7), o, rZ,-said ma ets tans being operatedto open their va ves 61. 1'32, 63, 6st, whereby the oil is permitted tocirculate through the motor. The brare 11153 now been lifted, and. thecar, due to its weight, starts downward. The motor being drive.-

the car, acts as a pump to draw the oil from the tank and returns it tothe oil tank F, the oil in the tank F in turn forcing the water backinto the tank D.

The speed of the car is controlled during both its ascent and descent,by the position of the controller lever which determines how many of thealves G1, 62, 63, and 6-1 shall be open at any time.

Although for the purpose of illustration, I have shown the systemarranged to show a single elevator car, it will be understood that wherea bank of elevators is installed, a. common steam gei'ierating plant forall the elevators may be employed, an d also a common discharge tank maybe used for all the.

elevators.

It will be seen that the various valves for controlling the steam andthe circulation of the liquid for driving the motor are balanced. T hatis, in any valve chamber, the upward and downward pressures of the fluidon the vertically movable valve therein, are equal. The inner faces ofthe valve chambers are also provided with annular recesses 120 oppositetheir ports whereby lateral pressure on the valves is avoided.

By the t rms hydraulic motor or hydraulic engine is meant a motor orengine operable by the circulation therethrough of a liquid rnon-compressible fluid such as oil or otl'ier lubricating liquid.

Variations may be resorted to without departing from the spirit andscope of my invention and portions of the invention may be used withoutothers.

lVhat I claim is 1. In a hydro-steam elevator system, the combinationwith a car and an engine to drive the car, means to supply steam underpressure providing driving power for the engine, and two columns offluid, consisting respectively of column of water and a. column .ubricating fluid, both interposed between and the engine, said column of uizlcon'nn uni eating with the engine, and said water column interposedbeeen the steam-and lubricating fluid to \lrive the latter through theengine.

2. In a hydro-steam elevator system, the combination with a car and anengine to drive the car, means to supply steam pressure, a lubricatingfluid actuated by the steam pressure and circulated through the engineto drive it, and a water column interposed between the steam and saidfluid.

3. In a hydro-steam elevator system, the combination of an elevator car,an engine at upper end of the elevator shaft arranged to drive andcontrol the car, said engine having inlet and discharge ports,receptacles communicating respectively with the inlet and dischargeports, liquid for driving the motor, said engine operable by said liquidcirculating therethrough from one receptacle to the other, a steamgenerating plant, a riser through which steam is conveyed for applyingpressure to the liquid in one receptacle to cause the liquid to drivethe motor.

l. In a hydro-steam elevator system a steam generating plant, anelevator car, a hydraulic motor in an elevated position, on ranged todrive the car, liquid to drive the motor, receptacles for said liquidadjacent the upper end of the elevator shaft, a riser from the steamgenerator through which steam is conveyed upward to the liquid in onereceptacle and by which the liquid is forced through the motor to theother receptacle and thereby caused to drive the motor, and means toexhaust the steam.

5. In a hydro-steam elevator system, the combination with a car, of anengine operable to drive the car, said engine having an inlet port and adischarge port, conduits communicating respectively with said ports forconveying a fluid to and from the en gine, and valve mechanismcomprising a series of valves each controlling a passage in both saidconduits, and means to operate said valves seriaze' m.

6. In.a hydro-steam elevator system, the combination of a car, a motoroperable by a fluid circulating theretln'ough to drive the car, inletand discharge ports for the motor, conduits leading from said inlet anddis charge ports respectively for the passage of an operating fluid,valve mechanism controlling the flow of fluid through both saidconduits, means to supply steam under pressure for operating said fluidan exhaust port for the steam, and valves controlling both the steampressure and exhaust ports.

7. In a hydro-steam elevator system, the combination with an elevatorshaft, of an engine at the upper end of said shaft, said engine having arotary drive shaft, an ele vator car, a drum connected to the driveshaft, hoisting cables connecting the car and drum, means to supplysteam pressure, a lubricating fluid actuated by the steam pressure todrive the engine, and means cooperating with the engine to complete acirculating system for the fluid b} which the fluid is all retained atabout the evel of the upper end of the elevator shaft.

8. In a hydro-steam elevator system, a hyraulic engine having a rotarydriye shaft, a car, means whereby the car is driven from aid shaft,steam actuated brake mechanism, valve mechanism to control the supplyand exhaust steam to and from the brake mechanism, valve mechanismoperable to control the flow of liquid through the engine to therebycontrol the starting and stopping of the engine, a controlling lever,and electro-responsive means actuated thereby to concomitantly controlsaid valve mechanisms.

9. In a hydro-steam elevator, the combination of a car, a motor to drivethe car, the motor having inlet and exhaust ports, a noncompressiblelubricatin fluid by which the motor is driven, a receptacle to containsaid fluid and from which the latter is conveyed through said inlet portto the motor, means to supply steam pressure to the fluid in saidreceptacle, and a pressure transmitting medium through which. the steampressure is applied to said fluid and by which the steam is prevented'lron'i entering the receptacle, and a receptacle which the tluid isconveyed from the motor through said exhaust port.

10. In a hydro-steam elevator, the combination of a car, a hydraulicmotor comprising a rotary element connected to drive the car, anon-compressible lubricating Fluid, a pressure tank containing saidfluid for operating said motor, means for supplying steam under pressureand transmitting said pressure to said noncompressihle fluid and drivingit through the motor to operate the motor, said transmitting meanscomprising a liquid interposed between the steam and said lubricatingfluid, and a receptacle separate from the pressure tank, containing saidliquid.

11. In a hydro-steam elevator, the combination of a car, acounter-weight, a motor having an inlet and an outlet port andcomprising a rotary drive shaft, a drum on said shaft suspending saidcar and counterweight, a non-compressible fluid for operating saidmotor, an open tank communicating with the outlet port, a closed tankcontaining said fluid and communicating with the inlet port and meansfor supplying steam under pres sure and transmitting said pressure tosaid non-compressible fluid in the closed tank and driving said fluidthrough the motor into the open tank and thereby operating the motor.

12. In a hydro-steam elevator, the combination of a hydraulic motorhaving a plurality of cylinders, pistons in said cylinders, a driveshaft connected "ith said pistons, a drum attached directly to saiddrive-shaft, a car and a counterweight, cables suspending said car andcounterweight from the drum, a liquid for operating the pistons in thecylinders and causing the pistons to rotate the drum, and means forsupplying steam under pressure and transmitting said pressure to theliquid in the cylinders.

13. In a hydro-steam elevator, the combination of a car, a motorcomprising a rotary element connected to drive the car, anoncompressible lubricati g liuid for operating said motor, a pressuretank containing said fluid, means for supplyingsteam under pre sure, acompartment separate from said tank, and water in said compartmentforming a medium for transmitting said pressure to said non-compressiblefluid.

ll. in a hydrosteam elevator, the combination of a car, a motorcomprising a rotary element connected to drive the car, anoncompressible lubricating fluid circulating through the motor foroperating it, m ans for supplying steam undur pressure, and a watercolumn between the said lubricating fluid and the seam, through whichsaid pressure is transmitted to said luln'icating fluid.

15. in a hydro-steam elemtor, the comb.i--

nation of a car, a counterweight, a motor for driving said car andcounterweight, coinprising a plurality oi cylind pistons working in saidcylinders, a rotary element, a non-compressible lubricating fluid for operating the pistons in said cylinders, and causing the pistons to drivethe rotary element, and means for confining steam under pressure andtransmitting said pressure to said non-compressible fluid in thecylinders, said transmitting means comprising a *ater column betweensaid non-compressible lubrieating fluid and the steam.

16. In a hydro-steam elevator, the combination of a car and amotorhaving a rotary drive shaft to drive the car, a non-compressiblelubricating fluid for operating said motor, means for confining steamunder pressure to drive said fluid, a water column between saidnon-compressible fluid and the steam, and means to contain saidnon-compressible fluid arranged at a higher level than said watercolumn.

17. In a hydro-steam elevator, the combination or a car, a rotaryelement for transmitting power for driving said car, a multiple pistonengine arranged to drive said rotary element, a non-compressible fluidfor operating said engine, means to supply steam under pressure forkeeping said noncomg iressible fluid under pressure and driving itthrough the engine to operate said engine, and a receptacle arranged toreceive the fluid discharged from the engine atter driving it.

18. In a hydro-steam elevator, the combination of a rotary element, acar and coun tel-Weight suspended from said rotary ele ment, a multiplepiston engine for driving said rotary element in one direction to movethe car in one direction, means to supply a n iii-compressible fluid tosaid engine, means to supply steam pressure for keeping saidnon-compressible fluid under pressure to op-- erate the engine, saidengine being driven in the opposite direction independently of powersupplied thereto by said fluids.

19. In a hydro-steam elevator, the combination of a rotary element, acar and a counterweight suspended from said element, a motor comprisinga rotary drive shaft connected directly to drive said element, cylindersextending radially from the axis of the drive shaft and pistonsreciprocating in the cylinders, said element and shaft being rotatableby the weight of the car as the latter descends, and a non-eonmressiblefluid actuated by stean'i pressure to drive said motor for raising thecar, said fluid circulating through the motor while the car descends,and means to control said circulation and thereby control the speed ofmotor and car as the car descends.

20. In a hydro-steam ele ator, the combination of a rotary element, acar and coun- "erweight suspended from said element, a motor comprisinga rotary drive shaft connected to drive said element, said element andshaft being rotatable as the car descends, by a load including the caritself, and a noncompressible lubricating fluid actuated by steam underpressure for driving said motor and thereby rotating said rotary elementin the opposite direction and raising the car, and a water columninterposed between said non-compressible fluid and the steam.

21. In a hydro-steam elevator, the combination of a rotary element, acar and counterweight suspended from said element, a motor comprising arotary drive shaft connected to drive said element, said element andshaft being rotatable as the car descends, by a load including the caritself, and a noncompressible lubricating fluid actuated by steam underpressure for circulating said fluid through the motor and therebydriving said motor and rotating said rotary element in the oppositedirection and raising the car, and tanks into which the liquid isconveyed from the motor respectively during the ascent and descent ofthe car, and means to control the rotary element from the car.

In an elevator, the combination of a rotary element, a car andcounterweight suspended from said element, a motor to drive saidelement, said rotary element being rotatable as the car descends by aload including the car itself, and a non-compressible lubricating fluidactuated by steam under pres sure for circulating said fluid through themotor and thereby driving the motor in the opposite direction andraising the car, tanks into which the liquid is conveyed from the motorrespectively during the ascent and descent of the car, valve mechanismfor controlling said non-compressible lubricating fluid and the steampressure, and manually operative means in the car for controlling saidvalve mechanism.

23. In an elevator, the combination of a rotary element, a car andcounterweight suspended therefrom, a motor having a drive shaftconnected to said element, lubricating liquid, means to supply steamunder pressure to drive said liquid and cause the latter to drive themotor, valve mechanism controlling the supply of steam, separate valvemechanism controlling the circulation of said liquid and therebycontrolling the speed of the motor, and electro-responsive means forcontrolling said valve mechanism.

24-. In an elevator, the combination of a rotary element, a car and acounterweight suspended therefrom, a motor having a drive shaftconnected to said element, and radially reciprocating pistons, means tosupply steam under pressure, a fluid actuated by said pressure andoperable to drive said motor and cause it to lift the car, said lluidcon trolling the motor during the descent of the car, valve mechanismarranged to concomitantly control said fluid and steam, and. means inthe elevator car for controlling said valve mechanism.

25. In an elevator, the combination of a rotary element, a car andcounterweight suspended therefrom, a motor having a drive shaftconnected to said element, said motor operative to lift the car andconcomitantly lower the counterweight, means to supply steam underpressure, oil driven by the steam to actuate said motor in a directionto lift the car and lower the counterweight, a water column interposedbetween the steam and oil and means to control the circulation of oiland thereby control the rotation of the motor during the descent of thecar and the ascent of the counterweight.

26. In an elevator, the combination of a rotary element, an engineconnected to drive and control said element, a car and counter weightsuspended from said element, ports for said engine, a pressure TGSQIVOlIconnected with one port, a liquid in said reservoir, an open tankconnected with the other port, means to supply steam under pressure tosaid liquid for forcing the liquid through the engine to thereby drivethe engine, the liquid being discharged from the engine into the opentank, the engine being operative when driven by said liquid, to rotatethe retary element in direction to raise the car and lower thecounterweight.

27. In an elevator, the combination of a rotary element, an engineconnected to drive and control said element, a car and a counterweightsuspended from said element, ports for said engine, a pressure reservoirconnected with one port, a liquid in said reservoir, an open tankconnected with the other port, means to supply steam under pressure tosaid liquid for forcing the liquid through the engine to thereby drivethe engine, the liquid being discharged from the engine into the opentank, the engine being operative when driven by said liquid, to retatethe rotary element in a direction to raise the car and lower thecounterweight, means to cut oil the supply of steam from said liquid,and means to connect the pressure tank with an exhaust, therebypermitting the rotary element to be driven by a load including theelevator car and drive the engine, and cause the latter to draw thefluid from the open tank and return it into the pressure reservoir asthe car descends.

In an elevator, the combination of an engine comprising a plurality ofcylinders and pistons working in the cylinders, a shaft connected withsaid pistons. a traction sheave on said shaft, cables running on saidsheave, a car and a counterweight suspended by the cables, a liquidunder pressure for actuating said pistons, means to supply steam underpressure for applying pressure to said liquid, and means to control saidliquidjand steam pressure, and thereby cause the elevator andcounterweight to be raised and lowered by said engine.

29. In an elevator, the combination of a multiple cylinder enginecomprising pistons reciprocating in the cylinders, an engine shaftconnected to said pistons, a traction sheave on said shaft, an elevatorcar and counterweight suspended from said traction sheave and driventhereby, a liquid to drive said engine, a pressure tank containing saidliquid, means to supply steam under pressure and apply said pressure tosaid liquid in the tank and cause it to circulate through the engine anddrive the engine, and valve mechanism interposed between the engine andsaid tank and controlling the rate of flow of the liquid to the engine,thereby controlling the speed of the engine.

30. In an elevator, the combination of a multiple cylinder enginecomprising pistons reciprocating in the cylinders, an engine shaftconnected to said pistons, a traction sheave on said shaft, an elevatorcar and counterweight suspended from said. traction sheave and driventhereby, a liquid to drive said engine, ports to admit and dischargesaid liquid to and from said. cylinders, a pressure tank connected withone of said ports, an open tank connected with the other port, means tosupply steam under pressure to saidpressure tank to apply pressure tosaid liquid, and means to control the admission of steam pressure to theliquid and the circulation of the liquid for actuating the engine toraise the elevator car and to control the descent of the car.

31. In a hydro-steam elevator, the com.- bination of a car, a motorhaving a rotary drive shaft connected to drive the car, a. liquid foroperatii'ig said motor, means for supplying steam under pressure forkeeping said liquid under pressure to operate said motor, valvemechanism controlling the How of said liquid to the motor to therebycontrol the speed of the motor, separate valve mechanism controlling thesupply of steam pressure to said liquid, and electromagnetic means toactuate the valve mechanisms.

In a hydro-steam elevator, the combination of a car, a motor having arotary driveshaft connected to drive the car, a liquid for operatingsaid motor, means for supplying steam under pressure for keeping saidliquid under pressure to operate said motor, valve mechanism controllingthe flow of said liquid to the motor to thereby control the speed of themotor, separate valve mechanism controlling the supply of steam pressureto said liquid, and electroiinignetic means to actuate the valvemechanism, and a manually operated switch in the elevator car forcontrolling said electromagnetic means.

In an elevator, the combination of a car, an oil driven motor connectedto drive the car, means to contain oil for driving the motor, means tosupply steam under pressure to apply pressure to the oil, and a pressuretransmitting medium consisting of a liquid heavier than oil interposedbetween. the steam and the oil.

8%. In an elevator, the combination of a car, an oil driven motorconnected to drive the car, means to contain oil for driving the motor,means to supply steam under pressure to apply pressure to the oil, and aliquid heavier than the oil. arranged to prevent the steam from comingin direct contact with V the oil.

In an elevator system, the combination of a multiple cylinder engine, ashaft for said engine, said engine comprising pis tons in said cylindersand connected to said shaft, inlet and outlet ports for said cylinders,and a fluid adapted to be circulated through said cylinders to drive theengine in one direction and to control the running of the engine in theother direction, said fluid being actuated by steam pressure whiledriving the engine, a traction sheave on the engine shaft, and anelevator car and a counterweight suspended from said traction sheave andoperated thereby.

36. In an elevator system, the combina tion of an engine, a tractionsheave operated thereby, an elevator car and a counterweight suspendedfrom said sheave, a steam gener ating plant, a pressure tank for theengine, containing oil adapted to circulate through and drive theengine, a pressure tank containing water communicating With the oiltank, means for conveying steam from the generating plant to said waterpressure tank, and valve mechanism for controlling the supply of s camand the circulation of said oil.

37. In an elevator system, the combination oi a multiple cylinder enginecomprising pistons in the cylinders, a shaft to which the pistons areconnected, a traction sheave on said shaft, an elevator car andcounterweight suspeiulcd from said sheave, a liquid 0 ierr-ible unde'pressure to actuate said engine and drive said car and counte weight, atank containing said liquid and communicating with the engine, and meansto supply steam under pressure to said tank, an exhaust tank into whichthe liquid is exhausted from the engine and from which the engineoperable to pump the liquid back into the pressure tank, and means toregulate the return flow of liquid and thereby control. the speed of themotor.

38. In an elevator, the combination oi a car, a counterweight, atraction sheave, an engine for driving said sheave, sail, engine havinginlet and discharge ports, containers, oil therein, said containersopening respectively to said. inlet and exhaust ports, means to supplysteam under pressure for actrating said oil and causing it to drive theengine and rotate the traction sheave, and thereby drive the car andcounterweight.

In an elevator, the combination of a car, a counterweight, a tractionsheave, an engine for driving said sneave, said engine having inlet anddischarge ports, containers, oil therein, said containers opening respectively to said inlet and discharge port, means to supply steam underpressure, and transmit said pressure to the oil in one of aidcontainers, and thereby cause the oil to circulate hrough the engine anddrive it in a direc on to lift the car.

40. In an elevator, the combination of an elevator c r, a counterweight,a traction sheave from which said car and counter weight are suspended,an engine driving said traction sheave, ports on said engine forminginlet and discharge, and means to contain a in 'icating fluid connectedto each of said po steam pressure for obtaining pressure on the fluid inone of said means, and thereby circulating the fluid through. the e mineand driving the engine and cause the elevator to be raised, n'icans tocut oil. said steam pressure,

and means to connect said last mentioned container with an exhaust torelieve the steam pressure from the oil lubricating fluid and therebycause the elevator car to descend.

a l. In an elevator, the combination of a traction sheave, a car andcounterweight suspended from said sheave, an engine for driving saidsheave, said engine including a plurality of cylinders, two chambers,and ports individual to said cylinders and connecting each cylinder toboth of said chamhers, containers for oil connected respectivc-ly tosaid chambers, means for supplying steam under pressure for controllingsaid oil and causing it to drive the engine in one direction, and meansto cut oil said steam pressure and permit the engine to be driven in theopposite direction by a load including the elevator car.

42. In an elevatm', the combination of a car, a counterweight, atraction sheave suspending said car and counterweight, an engine fordriving said sheave, said engine having pressure and discharge ports,two pressure tanks connected in series with the PYGSSUITG port, and adischarge tank communicating with the discharge port, oil in one of saidpressure tanks, the other containing water, and means for conductingsteam under pressure to the water pressure tank.

43. In a hydro-steam elevator system, the combination of a tractionsheave, a fluid motor for rotating said sheave, a car and acounterweight suspended from said sheave and operated thereby, means tolock the fluid in the motor and thereby control the motor, a brake forsaid motor, means to supply steam pressure for operating the brake, avalve to control said supply, and electroresponsive means to control thevalve.

44. In a hydro-steam traction elevator sys tem, the combination of afluid. engine, a traction sheave driven thereby, a car and a counterweight suspended from said sheave, a fluid, means to supply steam underpressure to said fluid for operating said engine in one direction, theengine being driven in-the opposite direction by a load including thecar, means to break the engine by locking the fluid therein and a brakeoperated by steam pressure.

45. In a hydro-steam elevator system, the combination of a tractionsheave, a fluid motor for operating said sheave, means for locking thefluid in the motor and thereby controlling the motor, a car and acounterweight suspended from said sheave and operated thereby, a steamoperated brake for said motor, means to supply steam for operating thebrake, valve mechanism controlling the supply of steam to the brake, andelectro-responsive means controlled from the car for controlling saidval ve mechanism.

46. In a hydro-steam elevator system, the combination of a fluid motorand a traction sheave connected thereto and adapted to be rotatedthereby, a car and a counterweight suspended from said traction sheave,valves arranged to lock the fluid in the motor and thereby control themotor, a steam operated brake for said motor, means to supply steampressure to operate the brake, and electro responsive means toconcomitantly control said steam pressure and said valves at will fromthe elevator car.

47. In a. hydro-steam elevator system, the combination of a tractionsheave, a fluid motor for rotating said sheave, motor-controlling valvesto lock fluidin the motor, a car and a counterweight suspended from saidsheave and operated thereby, a brake for said motor, a spring forapplying the brake while the motor is at rest, means operated by steamfor releasing the brake, and electromagnetically operated valvemechanism to control the supply oi steam to said releasing means, and.thereby control the brake.

4-8. In a hydro-steam elevator system, the combination of a tractionsheave, a iiuid motor for rotating said sheave, a car and acounterweight suspended from said sheave and operated thereby, a. brakefor said sheave means to operate aid brake by steam, and anelectro-responsive device for controlling said brake.

4-9. in a hydro-steam elevator system, the combination of a tractionsheave, a fluid motor for rotating said sheave, a car and acounterweight suspended from said sheave and operated thereby, a brakefor said motor, means to operate said brake by a fluid, anelectro-responsive device for controlling said fluid, and a manuallyoperated switch in the car for controlling said electro-responsivedevice.

50. In a hydro-steam elevator system, the combination of a tractionsheave, a fluid motor for rotatin said sheave, a car and a counterweightsuspended from said sheave and operated thereby, a brake for said motor,brake applying means including a cylinder, and a piston in saidcylinder, means to supply fluid under pressure to the cylinder foroperating said piston, a valve for controlling said fluid, anelectro-responsivc device for operating said valve, and a man- .uallyoperated circuit closer in circuit with said electroresponsive devicefor controlling it.

51. In a hydro-steam elevator system, the combination of a tractionsheave, a fluid engine for rotating said sheave, a car and acounterweight suspended from said sheave and operated thereby, alubricating fluid for driving the engine, ports for said fluid to enterthe engine and discharge therefrom, means to supply steam under pressurefor actuating said fluid, a brake, and a controller operable to controlsaid fluid, said steam, and said brake.

In a hydro-steam elevator system, the combination of a traction sheave,a fluid motor for rotating said sheave, a car and a counterweightsuspended from said sheave and operated thereby, a bi: he for saidmotor, oil to drive the motor, means to supply steam under pressure forcirculating said oil and thereby driving the motor in one direction,means to control said steam ann said oil, mechanism actuated by steampres sure for operating the brake, and means for controlling the steampressure to the brake operating mechanism in conjunction with the firstmentioned controlling means.

53. In a hydro-steam elevator system, the

combination of an elevator car and counterweight, an oil engine, atraction sheave rotatable thereby and suspending said car andcounterweight, oil to drive the engine, means to supply steam underpressure for circulating the oil to thereby drive the engine, ar Iplurality of valves for controlling the circulation of the oil, a valvecontrolling the steam, electromagnets to operate said valves, and amanually operated electric switch in the car to effect the operation ofthe electro magnets and thereby cause a concomitant operation of saidvalves.

In a hydro-steam elevator, the combination with a car and a motor todrive the car, said motor operable by the circulation of oiltherethrough, of an oil pressure tank, a water pressu e tank, a pressurepipe leading from the upper portion of the oil tank to the motor, a pipeconnecting said tanks and opening into the tanks near the bottomsthereof, and a steam pipe opening into the water tank at the upperportion thereof whereby steam under pressure admitted through the steampipe to water in the water tank may force the water through saidconnecting pipe into the oil tank and force oil from the oil tankthrough said pressure pipe to the motor and thereby drive the motor.

553. In a hydro-s cam elevator, the comb-ination with a car and a motorto drive he car, said motor operable by the cireulatimi oi oi] therethrr'flgh, oi' an oil pre re tank, a water pressure tank, a pre sure pipeleading from the mpg-er portion of the oil tank to the motor, a pipeconnecting said tanks and opening into the tanks ne: the bottom thereof,and a steam pipe opening into the water tank at the upper portionthereof \vherel'ry steam and admitted through the steam p l to water inthe water ank may force the water through said connecting pipe into theoil tank and force oil from the oil tank. through said pressure pipe tothe motor and thereb dri the motor in. one direction, a reservoir forthe oil d" charged from the motor, and a disehar pipe leading from themotor to said r voir, the motor operable when runmng the reversedirection to return the oil and water to their pressure tanks.

56. In a hydro-steam elevator combination of a car, a motor to din car,said motor operable by circulation oi oil therctln'ough, the motorhaving a sub per stantially constant oil capacity so that the volume ofoil therein remains substantially constant throughout its run, an oilpressure tank containing oil to drive. the motor, means for conductingthe oil from said tank to the motor, said tank being of acapacity tocontain oil suflicient to drive the motor during a full run of the carfrom its lowest to its highest position, and a receptacle into which theoil is discharged during the run of the motor.

In a hydro-steam elevator, the combination of a car, a motor to drivethe car, said motor operable by the circulation therethrough of oilunder pressure, an oil pres sure tank, a water pressure tank, said tanksbeing substantially on a level, a pipe connccting said tanks near theirlower ends, the oil tank arranged to contain Water in the bottomthereof, the level of the water being above said connecting pipe whenthe car is at the bottom of its run, said water in the. oil tanksupporting oil thereon, the oil. tank being of snliicient capacity forthe oil therein to run the motor and lift the car from the bottom to thetop of its run, and means to supply steam under pressure to the watertank and force the Water therein through said connecting pipe into theoil tank and thereby drive the. oil through the motor for driving thelatter.

58. In an elevator, the combination of a car, a motor connected. todrive the car, said motor operable by a liquid forced to circulatetherethrough, a valve mechanism controlling the circulation of saidliquid and comprising a plurality of valves in parallel relation in thecirculating system, means to supply steam under pressure to apply duringdriving pressure to said liquid, a valve mechanism controlling thesupply of steam, and valve. controlling means to operate said valvemechanism in succession and arranged to open said parallel valves scrim21m.

59. In an elevator, the combination of a car, a motor connected to drivethe car, said motor operable by a liquid forced to circulatethcretln-ough, valve mechanism CO11 trolling the circulation of saidliquid and comprising a rdurality of valves in parallel relation in thecirculating system, each of said valves controlling ports through whichthe liquid is conducted to the motor, and separate. ports through whichthe liquid is conducted from the motor, each valve permitting a.restricted [low toward and from the motor, and valve controllingmechanism for opening any desired number of the valves to therebycontrol the speed of the motor.

(30. In an elevator, the combination with a car, of a motor connected todrive the car, said motor operable by a liquid circulating therethrough,means forming with ,the motor, a circulating system for the liquid,valves in said system e'vternally of the motor andcontrolling thecirculation of liquid through the motor, means to supply steam pressureto the liquid, a steam valve normally closed to cut off the supply ofsteam pressure while the motor is at rest, and a controller operablefirst to open the steam valve and then said first mentioned valves,whereby the steam pressure is applied to the liquid before the latter ispermitted to circulate through the motor.

61. In an elevator, the combination with a car, of a motor connected todrive the car, said motor operable by a liquid. circulatingtherct-hrough, means forming with the motor, a circuhiting system forthe liquid, valves in said system externally of the motor andcontrolling the circulation of liquid through the motor, means to supplysteam pressure to the liquid, a steam valve normally closed to cut elfthe supply of steam pressure while the motor is at rest, electromagnetsfor operating the valves, and a controller operative when moved from anormal position of rest, first to operate the magnet for the steam valveto admit pressure to the liquid, and then to operate the first mentionedvalves successively to gradu ally open the circulating system.

62. In an elevator, the combination of a car, a motor connected to drivethe car, an oil pressure tank to contain oil to drive the motor, a waterpressure tank to contain water, said tanks being in communication topermit the water to displace the oil and drive the oil through themotor, means to supply steam under pressure to the water in the tank, anoverflow pipe leading from the water tank, a trap to receive theoverflow, and means operable automatically to discharge the water fromsaid trap.

63. In an elevator, the combination of a car, a motor connected to drivethe car, a lubricating fluid to drive the motor, a. pressure tankcontaining said fluid, a water tank communicating with said pressuretank, means to supply steam under pressure to said water tank, wherebythe water under said. pressure may cause the lubricating fluid to drivethe motor, an overflow chamber communicating with said water tank, avalve in said chamber, and a float arranged to operate said valve todischarge the water from said chamber.

64. In an elevator, the combination of a car, a motor connected to drivethe car, said motor being operable by a. liquid under pressure, means tosupply steam under pressure to the liquid, a valve controlling thesupply of steam to the liquid, a brake for the motor operable by steamunder pressure, means for conducting steam to the brake independently ofsaid valve, and a valve controlling the supply of steam to the brake,and valve mechanism controlling the circulation of liquid through themotor and operable to lock the liquid in the motor thereby providing anadditional brake for the motor.

65. In a l'iydro-steam elevator, the combination With a car, of ahydraulic motor having a rotary drive shaft, a drum and cables forming adriving COllYlGQt'lOl], bet on the motor and car, a non-compressiblelubricating fluid to drive the motor, means to supply steam to applypressure to said fluid, and a Water column forming a pressuretransmitting medium interposed between the steam and said fluid.

In a hydro-steam elevator, the combination with a car, of. an overheadengine U having a drive shaft connected to drive the car, liquidoperable by circulation tl'irough the engine to drive it, nuians formingwith the engine an overhead circulating system for said liquid, a steamgenerating plant, and a riser through which steam is conveyed from saidplant upward through the build ing to supply pressure to said liquid andthereby cause it to drive the engine.

(3'7. In an elevator system, the combination of a hydraulic motor havinga rotatable shaft, a drum rotated by said shaft, a car, a counterweight,cables connecting said car and counterweight and suspending them fromsaid drum, a steam generating plant, a riser from said steam generatingplant to the engine, a fluid reservoir connected with said. riser, andalso connected with an inlet port of the engine, and a receivingreservoir con nocted with a discharge port of the engine, and means tocontrol the tluid and the steam, and cause said fluid to be driven tromthe fluid reservoir through the engine to the receiving reservoir andthereby rotate the eugine.

G8. in an elevator system, the combination of a car, a hydraulic motorconnected to drive the car, a fluid actuated by steam precsure tocirculate through said motor and thereby drive it to lift the car, saidcar operable to drive the motor in the reverse direction and reverse thecirculation Oil the fluid therethrough, two receptacles for said fluid,one receptacle arranged to receive the fluid from the motor when the caris driven by the steam pressure actuating the fluid, the otherreceptacle arranged to receive the fluid when the motor is driven by thecar.

69. In an elevator system, the combination of a car, a hydraulic motor:lor driving said car, means suspending said car from said motor, fluidactuated by steam pressure to circulate through said motor and therebydrive it, two receptacles for said fluid, one receptacle arranged toreceive the fluid discharged from the motor While the fluid is acingactuated by steam pressure in the other reservoir, and is driving themotor.

70. In an elevator system, the combina tion with a car andcounterweight, of a hy draulic motor for driving said car andcounterweight, a drum connected with said motor, cables suspending thecar and counterweight from said drum, fluid actuated by steam pressurefor driving said motor, tivo receptacles for said l'luid, one receptaclearranged to receive the fluid as it is discharged from the motor Whilethe fluid is being actitiated to drive the motor by steam pressureapolied in the other receptacle.

71. In an elevator system, the combination of an elevator car, ahydraulic motor ha ring a rotatable shaft, a drum driven by said shaft,cables connecting the car with said drum, fluid actuated by steampressure and thereby forced through the motor to drive the same, and areceptacle into which the fluid is discharged from the motor While thelatter is being driven by said pressure.

72. in an elevator system, the combination of an elevator car, ahydraulic motor for driving said car, moans tor suspending said elevatorcar from said motor, a fluid actuated by steam pressure and therebyforced through the motor to drive it and lift the car, 1 ea us torelieve the fluid from tl steam pressure and cause the hydraulic notorto be driven by the car, and t'WO receptacles for the fluid, namely onereci-rptacle from which the fluid is forced through the engine by saidsteam pressure as the car ascends, the other receptacle arranged toreceive the fluid as it is discharged from the engine during the ascentof the car.

73. in an elevator system, the combination of a car, a hydraulic motorfor driving the car, means for suspending the car from the motor, afluid actuated by steam pressure and thereby forced through the motor todrive it and lift the car, means t relieve the fluid from the steampressure and cause the car to descend and drive the motor, and tworeceptacles for the fluid, the fluid being ceived by the u lot" from onereceptacle and conveyed through the motor and delivered to the otherreceptacle during the descent ot the car.

74. In an elevator stem, the combination of an elevator car, acounterweight, a hraulic motor having a rotatable shaft, 2 drum drivenby said shaft, cables suspending said elevator car and counterweightsaid drum, a fluid for driving the engine, means to supply steampressure to said fluid and force it through the engine to drive theengine and lift the car, a receptacle to which the fluid is delivered asthe car rises, said liquid being returned through the engine as the cardescends by its Weight, a receptacle to Which the fluid is deliveredfrom the motor as the car descends, and means to control the flow offluid through the motor.

'75. lo an elevator system, the combination of a car, a counterweight, ahydraulic engine, a liquid for driving said engine, said engine havingports through each of which the liquid flows to and from the enginealternately as the engine is operated in opposite directions, cablesconnecting the car and counterweight and suspended from the engine, anda valve system comprising valves controlling said ports and having anormal rest position in which they cut off the flow of liquid at bothports whereby the fluid is controlled and locked in the engine betweenthe ports, thereby holding the engine at rest.

76. In a hydro-steam elevator, the combination of an elevator car, ahydraulic motor, a 'rotatable drum connected to and driven by saidmotor, ropes suspending the car from said drum, said engine having inlot and discharge ports, valves at said ports, and valve controllingmechanism for simultaneously closing the valves atboth said ports andretaining them in closed position.

77. In a hydro-steam elevator system, the combination of a car, acounterweight, a hydraulic motor, fluid to drive the motor, a rotatabledrum connected to and driven by the motor, ropes suspending the car andcounterweight from the drum, said motor having inlet and dischargeopenings for the fluid, valves at said openings, and means forsimultaneously actuating said valves to control the flow of fluidthrough said openings, thereby controlling the starting, running andstopping of the motor, said valves having a normal position of rest inwhich they close said openings and thereby lock the motor.

78. In a hydro-steam elevator system, the combination of a car, acounterweight, a hydraulic motor, fluid to drive the motor, a rotatabledrum connected to and driven by the motor, ropes suspending the car andcounterweight from the drum, said motor having inlet and dischargeopenings for the fluid, valves at said openings, and means forsimultaneously actuating said valves to control the flow of fluidthrough said openings, thereby controlling the starting, running andstopping of the motor, said valves having a normal position of rest inwhich they close said openings and thereby lock the motor, saidcontrolling means being located at the car and manually operable atwill.

70. In a hydro-steam elevator system, the combination of a car, acounterweight, a hydraulic motor, fluid to drive the motor, a rotatabledrum connected. to and driven by the motor, ropes suspending the car andcounterweight from the drum, said. motor l'iaving inlet and dischargeopenings for the fluid, valves at said openings, means forsn'miltaneously actuating said valves to con trol the flow of fluidthrough said openings, thereby controlling the starting, running andstopping of the motor, said valves having normal rest positions in whichthey close said openings and thereby lock the motor, an electric controlsystem controlling said valve actuating means, said system comprising acontroller operable at will from the elevator car.

80. In a hydrosteam elevator system, the combination of a car, acounterweight, a hydraulic motor, a rotatable drum connected to anddriven by the motor, ropes suspending the car and counterweight from thedrum, a fluid for operating the motor, and means to supply pressure foractuating the fluid, the motor having inlet and discharge ports for thefluid, a system of valve control for simultaneously controlling thefluid at said ports, and a valve controlling system for controlling thesteam.

81. In a hydro-steam elevator system, the combination of a car, acounterweight, a hydraulic motor, a rotatable drum connected to anddriven by the motor, ropes suspending the car and counterweight from thedrum, a fluid for operating the motor, means to supply pressure foractuating the fluid, the motor having inlet and discharge ports :lor thefluid, a system of alve con trol for simultaneously controlling thefluid at said ports, a valve controlling system arranged to control thesteam, and means to simultaneously actuate the valves of both saidcontrolling systems.

82. In a hydro-steam elevator system, the combination of a car, acounterweight, a hydraulic motor, a drum connected to and driven by saidmotor, ropes suspending the car and counterweight from the drum, a fluidfor operating the motor, means to supply steam pressure for actuatingsaid fluid to drive the motor in one direction, means to relieve thefluid from the steam pressure and cause the motor to be driven in theopposite direction by the weight of the car, said. engine having inletand discharge ports for the passage of said fluid, and a valvecontrollinsystem for simultaneously controlling the fluid at both said ports forstarting the motor, for driving the motor in both directions, and forstopping the motor.

83. In a hydro-steam elevator system, the combination of a car, acounterweight, a hydraulic engine, a drum driven thereby, ropessuspending the car and counterweight from said drum, a hatchway havingguides for the car and counterweight, the engine being located in anelevated position rela tively to the car and counterweight, a steamgenerating plant in the basement, a fluid for operating the engine, ariser for conveying the steam under yn'essurc from said plant to theengine, the steam being operable to drive said fluid through the engineto operate it, and means to control the flow of said fluid and thesupply of steam pressure thereto.

84. In an elevator system, the combination of a car, a counterweight, ahydraulic motor, a rotatable drum connected to be driven by the motor,ropes suspending the car and counterweight from thedrum, fluid foroperating the motor, and means to supply pressure for actuating thefluid, the motor having inlet and discharge ports for the fluid, andvalve mechanism for opening said ports in running the elevator, and forclosing both said ports and holding them closed for stopping theelevator and holding it stationary.

85. In an elevator system, the combination of a car, a counterweight, ahydraulic motor, a rotatable drum driven by said motor, ropes suspendingthe car and counterweight from the drum, fluid for operating the motor,and means to supply pressure for actuating the fluid, the motor havinginlet and discharge ports for the fluid, and valve mechanism forsimultaneously opening said ports gradually during the acceleration ofthe motor for controlling the acceleration of the car.

86. In. an elevator system, the combination of a car, a counterweight, ahydraulic motor, a rotatable drum driven by the motor, ropes suspendingthe car and counterweight from the drum, fluid for operating the motor,and means to supply pressure for actuating the fluid, the motor havinginlet and discharge ports for the fluid, and valve mechanism forsimultaneously closing said ports gradually during the stopping of themotor for obtaining a smooth slowing down and stopping of the elevator.

87. In an elevator system, the combination of a car, a counterweight, ahydraulic motor, a rotatable drum connected to be driven by the motor,ropes suspending the car and counterweight from the drum, fluid foroperating the motor, and means to supply pressure :tor actuating thefluid, the motor having inlet and discharge ports for the fluid, andvalve mechanisn'i for simultaneously opening or closing said portsdillerent extents while the motor is running to thereby control thespeed oi the car, and also control the stopping of the car entirely bythe locking of the fluid in the motor.

Signed at Chicago, in the county oil Cook and State of Illinois this26th day of April A. D. 1916.

JOHN J. SPROUL.

Uopies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, T0. Q.

